[absent without leave (AWOL)] {adj.}
Absent without permission; used mostly in the military.
* /Jack left Fort Sheridan without asking his commanding officer, and was punished for going AWOL./
A Dictionary of American Idioms

[College Boards] {n.} A set of examinations given to test a student's readiness and ability for college. * /John got a high score on his College Boards./ * /College Boards […]A Dictionary of American Idioms